Final Fantasy Wiki
Final Fantasy Wiki

Its head is its weak point. Time your attack well -- if you attack when its head is inside its shell a Mega Volt will shoot back at you! TekMissiles are recommended.

Final Fantasy VI Playstation One Bestiary entry

The Ymir, also known as Whelk or "monster who eats thunder", is the first boss of Final Fantasy VI. It is faced at the end of the Narshe Mines during the raid on Narshe. When the imperial forces are in front of the frozen esper's room, one of the Narshe guards sends Ymir to attack the opposing forces, as a last stand against the invasion. It is one of the strongest creatures tamed by the Narshe guards.





Only one of the two parts needs to be defeated. The head is the easier part to kill, but every ten seconds it hides in the shell and becomes immune to damage until it reappears. The head attacks with a physical attack and Slime, which inflicts Slow on a character. Attacking the shell prompts it to counter with Megavolt, which will take a large chunk of HP from the party. While it is possible to destroy the shell, it will take a long time to destroy it due to its massive HP. Ymir can use Megavolt six times before it runs out of MP.


It is best to not attack the shell and focus on the head. While the head is out, Biggs and Wedge should use any elemental Magitek beams and Terra should use Magitek Missile. While the head is hiding, the party should use Healing Force and wait until the head reveals itself.

A strategy for a fast victory is to keep using Terra's Magitek Missile without letting the soldiers attack. With luck, the creature will die before it can retract its head.


Number Enemies Encounter flags Introduction flag Musical theme Magic AP
Normal Back Surrounded Side
432 Ymir (Shell), Ymir (Head) Y N N N Sides, synch. The Decisive Battle 0
Hide start messages. Prevent triple 7 for Joker's Death.

AI script[]


Attack Turns:
1st Turn: Attack (66%) or Slime (33%)


Every 10 seconds:

Display message: Ymir: Grawwwk...
If head is outside of shell:
Head retreats into shell
If head is inside of shell:
Head comes outside of shell

If attacked by anything: Megavolt (100%)

Other appearances[]

Final Fantasy XIV[]

Ymir appears as a boss in the dungeon "Hullbreaker Island (Hard)", introduced in patch 3.3. In this incarnation, Ymir is able to switch its element between lightning and ice by switching its shell. Several weaker, slug-like versions of the monster called "Ymir Unshelled" appear as regular enemies in the same dungeon.

Final Fantasy Dimensions II[]

Final rank artwork of Ymir.

Ymir is a wind-elemental Eidolon from Final Fantasy Dimensions II. It can be obtained as a signet for Parai to equip and teaches him the Reflect Guard abilities.

Dissidia Final Fantasy Opera Omnia[]

Baknamy FFTA2.pngThis section about an enemy in Dissidia Final Fantasy Opera Omnia is empty or needs to be expanded. You can help the Final Fantasy Wiki by expanding it.

Pictlogica Final Fantasy[]

PFF Ymir.png
Baknamy FFTA2.pngThis section about an enemy in Pictlogica Final Fantasy is empty or needs to be expanded. You can help the Final Fantasy Wiki by expanding it.

Final Fantasy Airborne Brigade[]

FFAB Ymir.png
Baknamy FFTA2.pngThis section about an enemy in Final Fantasy Airborne Brigade is empty or needs to be expanded. You can help the Final Fantasy Wiki by expanding it.

Final Fantasy Record Keeper[]

FFRK Ymir FFVI.png

Ymir appears as a boss in Final Fantasy Record Keeper.

Target Scores
  • Defeat Ymir without being countered
  • Rush*(Unofficial name): Standard attack
  • "Grawwwk...": Retreat into shell, or return to battle
  • Slime: Damage and Slow a target
  • Megavolt (Counter): Shell discharges Lightning against all targets

Players likely will have figured out the pattern from the previous two SNES-era bosses: attack, wait, attack, wait, repeat. This boss, however, hits about twice as hard, a fact made worse by its tendency to Slow its target. Ymir doesn't have any particular weaknesses. The player should again time the party's attacks while avoiding a direct hit on the shell and the resulting Megavolt retaliation, curing when needed. The pattern isn't hard to follow, but the fight could be a long one. Keep the pressure up and the rhythm steady for the win.

Mobius Final Fantasy[]

MFF Ymir FFVI.jpg
Impresario-ffvi-ios.pngThis section in Mobius Final Fantasy is empty or needs to be expanded. You can help the Final Fantasy Wiki by expanding it.



In Norse mythology, Ymir is the father of the race of giants and the grandfather of Odin, King of the Gods.

It has also been known as Whelk, and Biggs and Wedge call it "lightning whelk". The lightning whelk is an edible species of large predatory sea snail or whelk, a marine gastropod mollusc in the family Buccinidae, the busycon whelks.

Related enemies[]